Does the wash sale rule apply to Bitcoin?

§1091 mechanics: the four elements

Before getting to the Bitcoin-specific carve-out, it helps to know how §1091 works on traditional securities. A wash sale exists when ALL of the following are true:

1. A sale at a loss. Gains are fine; the rule only triggers on realized losses. Tax-gain harvesting (sell, immediately rebuy) is not affected.
2. Substantially identical replacement property. Apply the facts and circumstances standard. Identical shares are the straightforward case; a different ticker, issuer or index is not an IRS safe harbor. Preferred/common share relationships can depend on conversion terms, relative values and price behavior. ^[C10]
3. A 61-day window centered on the sale. 30 days before plus 30 days after plus the sale date. Any acquisition of substantially identical property inside that window triggers the rule, regardless of order.
4. The replacement is in an account you, your spouse, or a controlled entity owns. This includes your IRAIndividual Retirement Account (IRA)A retirement account with tax advantages and eligibility rules. Traditional IRA contributions may be deductible; taxable withdrawals generally enter income. Roth contributions use after-tax money, and qualified Roth withdrawals are tax-free.Full definition, your Roth IRA, your spouse's IRA, and accounts of corporations you control. See the Rev. Rul. 2008-5 trap below.

When a wash sale triggers, the loss is disallowed. The disallowed loss is normally added to the cost basis of the replacement shares, which preserves the deduction for whenever you eventually sell those replacements. Normally.

The Rev. Rul. 2008-5 trap: harvested loss disappears permanently

The single most expensive wash sale mistake retail investors make is harvesting a loss in a taxable brokerage and then rebuying the same security in an IRA or Roth IRA within 30 days. The IRS's Rev. Rul. 2008-5 addresses this case directly verify×DON'T TRUST, VERIFYClaim: Rev. Rul. 2008-5 holds that a loss disallowed under §1091 because of replacement property purchased inside an IRA cannot be added to the IRA's basis, so the loss is permanently lost.Verify at: IRS Rev. Rul. 2008-5 ↗The ruling is short. Read directly. Confirms that the wash sale rule applies across taxable and IRA accounts AND that the basis-recovery mechanism does not work because IRAs do not track basis the same way as taxable accounts..

Before harvesting, review substantially identical purchases across household accounts and suspend conflicting automatic buys. Your own IRA/Roth IRA replacement is specifically covered by Rev. Rul. 2008-5; ask a qualified adviser about employer-plan purchases and unusual ownership arrangements instead of assuming the ruling resolves every account type. ^{[C24] [C10]}

DRIP and auto-reinvest: the #1 accidental trigger

Dividend reinvestment plans (DRIPsDividend Reinvestment Plan (DRIP)A program that automatically uses dividend payments to buy more shares of the same stock.Full definition) and brokerage auto-reinvest features take quarterly dividends and immediately buy more shares of the same fund. If you harvested a loss on that fund in the last 30 days (or are about to harvest a loss in the next 30) the auto-reinvest is a substantially-identical purchase. It triggers the wash sale on as many harvested shares as the reinvestment buys. Most retail tax-loss harvesting failures come from forgetting this.

Practical defense: turn off DRIP / auto-reinvest in any taxable account where you plan to tax-loss-harvest. The dividends settle as cash and you reinvest manually after the 30-day window clears. The 0.25%-ish drag from delayed reinvestment is trivially small versus a disallowed harvest.

Side-by-side: successful harvest vs failed harvest

The Bitcoin ETF carve-out (and its own trap)

Direct spot BTC is not the same asset as an exchange-traded trust share. Do not apply direct-Bitcoin tax assumptions to securities. Spot Bitcoin ETFExchange-Traded Fund (ETF)A basket of investments (stocks, bonds, or Bitcoin) that trades on a stock exchange like a single share. shares (IBIT, FBTC, BITB, etc.) are securities. §1091 applies to them in the normal way verify×DON'T TRUST, VERIFYClaim: Spot Bitcoin ETFs are securities subject to §1091 wash sale rules.Verify at: IBIT prospectus ↗ · 26 USC §1091 ↗Section 1091 applies to stock or securities. A fund or trust share must be analyzed separately from directly held Bitcoin; do not assume all exchange-traded products share one regulatory structure.. That creates a specific trap for households who hold both: sell IBIT at a loss in a taxable brokerage and buy FBTC inside the 30-day window, and there is a serious argument the two are substantially identical (both spot BTC trusts tracking the same underlying). The IRS has not ruled on cross-sponsor ETF wash sales for spot BTC specifically, so the conservative play is to treat them as identical and either wait 31 days or harvest by selling spot BTC instead.

The cleanest workflow for households running both self-custody BTC and spot ETFs: harvest losses on the spot side (no wash sale), hold the ETF position untouched. The carve-out only applies to the spot side, so use it on the spot side.

Why this asymmetry exists

The wash sale rule, codified at Section 1091 of the Internal Revenue Code, was passed in 1921 to stop investors from realizing artificial losses on stocks and bonds at year-end while keeping their position. The text of 1091 explicitly applies to "stock or securities" verify×DON'T TRUST, VERIFYClaim: IRC Section 1091 applies to "stock or securities"; the IRS classifies virtual currency as property (Notice 2014-21).Verify at: 26 USC §1091 ↗ · IRS Notice 2014-21 ↗The statute names securities specifically. The IRS's 2014 guidance classifying virtual currency as property pulls Bitcoin outside that scope.. Bitcoin is classified as property under IRS Notice 2014-21. Property is not a security. Section 1091 therefore does not reach it.

This is the plain reading of the statute combined with the IRS's own definitional guidance, not a clever interpretation.

Worked example

You bought 1 BTC at $80,000 in March. By December the price is $60,000. You have an unrealized $20,000 loss.

Your new cost basis on the rebuy is $60,000 before fees. A $20,000 realized loss is not a $20,000 tax saving: its usable value depends on netting, deduction limits and your tax rates. The lower replacement basis can create a larger future taxable gain, while execution price, fees and market risk can change the economic outcome. ^[C10]

Legislative risk

Congress has proposed extending Section 1091 to digital assets in multiple tax bills since 2021. None has become law as of September 2026 verify×DON'T TRUST, VERIFYClaim: No enacted federal legislation has extended Section 1091 to digital assets as of September 2026.Verify at: Congress.gov bill tracker ↗ · IRS virtual currency FAQ ↗Tax bills move continuously. Confirm the current statutory text before relying on this exemption.. Treat the loophole as potentially closing in any tax year. The practical implication is to harvest losses in the year they occur rather than save them for later, because the rules might change.

What this loophole does not do

• It does not eliminate gains tax. The new cost basis means future appreciation is taxable from $60,000, not from $80,000.
• It does not work on Bitcoin ETFs. IBIT, FBTC, and other spot ETFs are securities. Section 1091 applies to them. A loss sale and rebuy across two Bitcoin ETFs can be disallowed as a wash sale; treat them as substantially identical.
• It does not eliminate the holding period reset. The rebuy starts a new short-term holding period. Waiting to rebuy does not change this: the new lot must be held more than a year for long-term treatment.

Common questions

Related reading

• Bitcoin tax-loss harvesting · the full mechanics
• Bitcoin cost basis methods · FIFO vs HIFO vs Specific ID
• Bitcoin taxes · the umbrella page
• Tax-gain harvesting · the 0% bracket strategy